S-91263A241 3/4"-10 x 2 1/2" ASME B18.3 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating that protects against rust in demanding industrial environments
• Exceptional load-bearing capacity with 120,000 psi tensile strength for heavy-duty applications requiring reliable fastening
• Precise thread engagement with Class 3A fit ensuring tight, secure connections that resist vibration loosening
• Optimized head design featuring an 82° countersink angle for flush mounting and reduced stress concentration
• Enhanced durability from Rockwell C32 hardness providing excellent wear resistance and long service life
• Easy installation and removal with 1/2" hex drive allowing high torque application without stripping
• Full threading capability enabling maximum grip length and uniform stress distribution along the entire fastener

Professional Applications & Engineering Value

This zinc-plated alloy steel flat head screw delivers critical performance advantages for industrial applications where vibration resistance and structural integrity are paramount. The combination of 3/4"-10 UNC coarse threading with Class 3A fit ensures rapid installation while maintaining precise thread engagement in heavy machinery, structural steel frameworks, and equipment assembly. The 82° countersink angle provides optimal flush seating in tapered holes, minimizing protrusion risks in automated systems. With fully threaded design and 120,000 psi tensile strength, this fastener distributes clamping forces evenly, preventing joint failure in high-stress environments. The zinc plating offers essential corrosion protection for outdoor equipment, manufacturing facilities, and marine-adjacent applications, significantly extending service life while maintaining consistent performance.

Specification Summary & Compliance

Manufactured to exacting inch system dimensions with Class 3A thread fit for superior precision and UNC coarse thread spacing for efficient assembly. This fastener meets ASME B18.3 specifications for dimensional accuracy and performance requirements. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory adherence for global industrial applications.